nir/lower_system_values: Assert/assume direct var derefs
System values are never arrays or structs so we can assume a direct var deref. This simplifies things a bit and prevents us from accidentally throwing away an array index. Suggested-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com> Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com> Acked-by: Rob Clark <robdclark@gmail.com> Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Acked-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
parent
a331d7d1cd
commit
aef4213fca
|
@ -41,12 +41,21 @@ convert_block(nir_block *block, nir_builder *b)
|
|||
if (load_deref->intrinsic != nir_intrinsic_load_deref)
|
||||
continue;
|
||||
|
||||
nir_variable *var =
|
||||
nir_deref_instr_get_variable(nir_src_as_deref(load_deref->src[0]));
|
||||
|
||||
if (var->data.mode != nir_var_system_value)
|
||||
nir_deref_instr *deref = nir_src_as_deref(load_deref->src[0]);
|
||||
if (deref->mode != nir_var_system_value)
|
||||
continue;
|
||||
|
||||
if (deref->deref_type != nir_deref_type_var) {
|
||||
/* The only one system value that is an array and that is
|
||||
* gl_SampleMask which is always an array of one element.
|
||||
*/
|
||||
assert(deref->deref_type == nir_deref_type_array);
|
||||
deref = nir_deref_instr_parent(deref);
|
||||
assert(deref->deref_type == nir_deref_type_var);
|
||||
assert(deref->var->data.location == SYSTEM_VALUE_SAMPLE_MASK_IN);
|
||||
}
|
||||
nir_variable *var = deref->var;
|
||||
|
||||
b->cursor = nir_after_instr(&load_deref->instr);
|
||||
|
||||
nir_ssa_def *sysval = NULL;
|
||||
|
|
Loading…
Reference in New Issue